For example, fractional distillation is used in oil refineries to separate crude oil into useful substances (or fractions) having different hydrocarbons of different boiling points. The crude oil fractions with higher boiling points:1  have more carbon atoms.or example, fractional distillation is used in oil refineries to separate crude oil into useful substances (or fractions) having different hydrocarbons of different boiling points. The crude oil fractions with higher boiling points: 1  have more carbon atoms.
Placenta accreta is a serious pregnancy complication that can occur when the placenta attaches itself too deeply into the uterine wall. Placenta accreta is a serious pregnancy complication that can occur when the placenta attaches itself too deeply into the uterine wall. This causes part or all of the placenta to stay firmly attached to the uterus during childbirth. Placenta accreta can result in severe bleeding after delivery. According to the American Congress of Obstetricians and Gynecologists (ACOG), 1 in 533 American women experience placenta accreta each year. In some cases of placenta accreta, a womanâs placenta will attach so deeply into the uterine wall that it attaches to uterine muscle. This is called placenta increta. It can even go more deeply through the uterine wall and into another organ, such as the bladder.
Sometimes the placenta attaches itself into the wall of the uterus too deeply. 1  Placenta accreta â The placenta attaches itself too deeply and too firmly into the uterus.  Placenta increta â The placenta attaches itself even more deeply into the muscle wall of uterus.